Nina looks at gymnastics with the help of Felix, her touch neuron, finding out why knees are so important and how they help with balance.

Streaming video file encoded with permission for digital streaming by Infobase on October 01, 2015.

Meet the Neurons --(0:57) -- Why Do We Bend Our Knees When We Land? -- (2:30) -- Senses Experiment -- (3:42) -- How Our Knees Work -- (2:56) -- Bent Knees Help Balance -- (1:48) -- Summary: Why Do We Bend Our Knees When We Land? -- (0:41) -- Credits: Gymnastics-Nina and the Neurons: Get Sporty -- (1:50).